If you don’t have your demo, this dispute will be denied and you can be liable for 1.6 if you don’t have your demos for future situations. It is up to you to have enough storage and to make sure your demos are recording, look at the guide given...
Can you TLDR this? In the video provided in the ban comments, an officer is dragging a old dead officer's body and has no interest in you yet you come out and gun the officer down, bringing more attention to yourself and leaving even more DNA. Please provide some sort of evidence from your POV...
It does state you were going 3mph, but from the video you squished him against the wall so it doesn't really matter what the speed states.
https://medal.tv/games/garrys-mod/clips/m0pz2uLxuKy1GFRI3?invite=cr-MSxyaWssMjA2MzIzMjQ3&v=16...
You admit to the rulebreak, there is nothing left to dispute here. If you disagree with the length, feel free to make a staff complaint. Make an apology if you want to apologise for you breaking the rules and the staff member who banned you may consider unbanning you.